Car-brake.



No. 638,556. Patented Dec. 5, |899. F. THEILENGERDES.

CAB BRAKE.

(Application led Jan, 6, 1899. Renewed Nov. 11, 1899.)

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No. 638,656. Patented Dec. 5, |899. F. THEILENGERDES.

GAR BRAKE.

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CAB BRAKE.

(Appl'ication led Jan. 6, 41899. Renewed Nov. 11, 1899.) (No Nudel.)A -3Sheets-$heei 3.

UNITED lSTATES PATENT Friuli?.

FREDERICK Tl-IEILENGERDES, OF MEMPHIS, TENNESSEE.

CAR-BRAKE..

SPECIFICATION forming part of Letters Patent No. 638,656, dated December5, 1899.-

Application lecl January 6, 1899. Renewed November ll, 1899. Serial No.786,689. (No model.)

l GERDES, a citizen of the United States, residing at Memphis, in thecounty of Shelby and State of Tennessee,have invented certain new anduseful Improvements in Car-Brakes; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to Whichit appertains to make anduse the same.

This invention relates to that class of brakes in which the brake'shoesare brought into action through throwingr into engagement africtionclutch upon one of the axles; and the novelty is foundprincipally in the clutch and the means for operating it. Practicallydevices of this class have proved unsatisfactory, largely because oil,dust, and oil-saturated dust accumulate upon the friction-surfaces-eadifliculty eliminated by this invention.

In the drawings,Figure lis a diagrammatic plan of street-car trucks withthe novel braking devices in position. Fig. 2 is a side elevation,partly in section, showing the same devices. Fig. 3 is an enlarged axialsection of the clutch, the adjacent operating devices being inelevation. Fig. t is a view looking from the right in Fig. 3. Figs. 5,6, 7, S, 9, lO and ll are detail views.

In the drawings, A represents the outline of a car-body, A' theholsters, B the truckframe, B the wheels, and B2 one of the axles, allwithout novelty.

At one end of the car is a vertical centrallypivoted brake-lever C,having its lower short arm connected to a brake-operating rod C, and atthe other end of the car is abrakestaff C2, having above a horizontalremovable hand-lever C3 and below a short arm C, connected to a secondbrake-operating rod C. These two rods are attached to opposite ends of acentrally-pivoted bar C5, and from one end of this bar aconnection C6runs to devices for throwing into action a certain frictionclutchconnected with a drum-sleeve D, normally free to slide and rotate uponthe axle B2. A cable D', winding upon the drum, passes over a pulley D2and returning is connected to one arm of a centrally-pivoted lever D3,whose opposite arms are connected in the usual way to rods D, operatingbrakebeams. (Not shown.) A ring E, concentric with the axle and having aplane side surface E, is rigidly secured to the axle by arms outside ofits plane and projecting from a hub keyed to the axle. An analogous ringF is rigidly fixed to the drum-sleeve by a web without the rings faceplane and is provided with an annular recess, formed by annular flangesF on its side face, to receive the ring E. Between the opposing faces ofthe two rings is placed a loose annular disk F2, of leather or the like.The drum-sleeveD projects beyond the plane of the two rings and hasbeyond this plane a circumferential flange D5.

It is essential to have that part of the axle upon which the drum-sleeveworks well lubricated; but to prevent in some degree the escape of oilat the clutch end the oil-channels D6 do not extend quite to that end.Such.

oil as may escape for the most part drops from the ange D5, yet somesmall portion creeps up the flange and dust collects, forming anever-increasing capillary mass; but the weight of the mass causes it tobreak off before it becomes injuriously largein amount and as it fallsto pass out between the arms. The flange F throws it away from therings, to which, moreover, these iianges leave small chance for dust toenter. It has followed in practical use of the devices that these ringsVery rarely need any attention whatever. At the opposite end thedrum-sleeve has a lplane face which normally rests against anupwardly-open U -shaped member G and against a forked saddle H, whichlits between the branches of the member G and whose pendent branches H'extend below the axle. Over the main portion of the saddle rests aforked lever I, whose branches I extend downward in contact with thebranches H, and near the middle each branch of the lever has aprojection 12, which rests against the member G. Between the branchesI-I, below the axle, is placed an oil-reservoir J, provided with a wickJ to raise oil to the axle, with a lateral projection to support themember G, and with forked lugs to rest upon a readilyremovable rod K,which passes through the branches H I, forming a fulcrum for the latter.The saddle H is prevented from rotating or tilting by a projection H2and aba-r IOO H3, extending therefrom to the truck-frame. The saddle andforked lever are held against moving from the drum-sleeve by a splitsleeve L, clamped to the axle, further secured by a dowel L', and havingon the meeting faces of its halves engaging projections to keep thehalves in exact relative positions. Obviouslyr if the upper end of theforked lever be forced toward the drum-sleeve the projections I2 pressthe member G forward, slide the sleeve, and bring the clutch into actionto wind the cable upon the drum. It is so swung by the connection C6,which engages the free end of a lever M, turning upon a largecylindrical portion N of a bolt N and provided with spiral cam-faces Mto meet corresponding faces on one side of the upper part H4 of thesaddle H. This bolt has a squared portion N2, loosely fitting ina squareaperture in the part H4, a smaller cylindrical part N3,.passing looselythrough the upper part I4 of the lever I, and a threaded terminalportion, upon which works a nut O, locked in any desired position by apin or cotter passing through the bolt and engaging in slots in a sleeveO2, formed integrally with the nut. The saddle prevents rotation of thebolt. Now when the lever M is swungin the proper direction, since thesleeve L prevents the saddle from yielding, the bolt slides, and the nutpressing against the part I4 the forked lever is swung on the pivot Kand the clutch is engaged. The combined multiplication of power bythelever M and .the screw-like cam-faces gives almost any desired force,the necessary sliding movement of the ring being only a small fractionof au inch.

It is obvious that this brake is practically instantaneous, that none ofthe novel devices interfere with the attachment of ordinary hand-brakeconnections, and that changes in construction can be made withoutdeparting from my invention. From this last consideration I desire toclaim myinvention broadly as well as specifically.

What I claim isl. The combination with a car-axle, of a sleeve mountedto slide and revolve upon the axle, an encircling friction-ring borne bysaid sleeve, a coacting friction-ring rigidly connected to the axleitself, an annular shield or fiange interposed between the shaft andsaid rings to protect the latter from oil, and means for forcing onering against the other.

2. The combination with a car-axle, of a revoluble sliding drum-sleeveupon the axle, an encircling friction-ring borne by the sleeve in aplane between its ends, a coacting friction-ring rigidly connected tothe shaft by arms extending over the adjacent portion of the sleeve atsome distance without the latter, an annular ange projecting outwardfrom that portion of the sleeve within the arms, and means for forciblysliding the sleeve upon the axle.

3. The combination with a car-axle, of a sliding, revolu ble drum-sleeveupon the axle, an encircling friction-ring borne by the sleeve in aplane between its ends and provided with annular iianges projecting,parallel to the axle, at the margins, respectively, of the ring, asecond friction-ring fitting between said iianges and supported from theaxle itself by rigid arms projecting from the axle over the adjacent endportion of the sleeve, an annular flange upon said end portion and meansfor forcibly sliding the sleeve upon the axle.

4. The combination with an axle, of a drumsleeve mounted to slide androtate upon the same and having a circumferential flange at one end, afriction-ring supported from the sleeve in a plane between its ends, asecond ring rigidly supported, alongside the rst, from a part of theaxle beyond said end of the drum-sleeve, and means for forcing thedrum-sleeve and its ring toward the rigidly supported ring.

5. The combination with a car=axle, of a Vfriction-clutch mounted uponthe axle and having a sliding drum-sleeve member, a collar upon theaxle, a saddle interposed be tween said member and collar, a leverpivoted upon the saddle to swing parallel to the axle and force saidmember toward its companion, a second lever swinging transversely withreference to the axle and having alateral cam-face working against thesaddle to move the lever bodily7 parallel to the axle, and a bolt orlink connecting the second lever to the free end of the first.

G. The combination with the axle, the friction-clutch thereon and thesleeve ixed to the axle at a short distance from the clutch, of theforked saddle between the clutch and sleeve, the forked lever passingover the saddle, a removable oil-reservoir between the branches of thesaddle, a wick raising oil therefrom to the axle, and a removablefulcrum-rod passing through the branches of both saddle and lever andsupporting said reservoir.

7. The combination with the axle, of the friction-clutch having onemember sliding thereon, the saddle held against lateral movement byconnection with the truck-frame and resting upon the axle at the end ofsaid member, the forked lever pivoted to the saddle and acting to slidesaid member, the bolt sliding in the upper portion of the saddle andengaging the free end of said lever, and a second lever revolublymounted on said bolt and provided with cam-faces acting against thesaddle and by reaction moving the bolt longitudinally and thus actuatingthe forked lever.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK THEILENGERDES.

Witnesses:

Tnos. J. TUCKER, S. J. STEVENS.

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